JPWO2015166916A1 - Radio circuit - Google Patents

Abstract

A wireless circuit capable of a plurality of types of wireless communication using an unlicensed frequency band is realized with a smaller number of components. The high-frequency circuit elements (13 to 23) and the modulation / demodulation processing unit (51) process LTE radio signals, and the high-frequency circuit elements (33 to 43) and the modulation / demodulation processing unit (51) process LTE-U radio signals. The high frequency circuit elements (33 to 43) and the modulation / demodulation processing unit (61) process WiFi wireless signals.

Description

  The present invention relates to a radio circuit capable of radio communication in an unlicensed frequency band.

  In recent years, with the development of various media and the advanced informationization of society, the data traffic of mobile communication is increasing rapidly. For this reason, a sufficient amount of data communication should be provided only by communication (2G communication, 3G communication, LTE communication, etc.) using a licensed frequency band (frequency band for which each communication carrier has been assigned a frequency band or licensed). Is getting harder.

  In order to alleviate such a situation, using WiFi (registered trademark, hereinafter omitted) communication using a license-free frequency band (frequency band that does not require a license or license, Unlicensed band, ISM band) Some have been offloaded.

  In addition, as a technique for more efficiently using an unlicensed frequency band, LTE-U communication in which LTE communication is performed in an unlicensed frequency band has been proposed (Non-Patent Documents 1 and 2).

  LTE-U communication is performed along with LTE communication using a licensed frequency band (simply referred to as “LTE communication” in this specification), and the downlink of LTE communication is performed by a mechanism of carrier aggregation or supplemental downlink. To offload part of the data traffic. In the future, it is also considered to offload part of the data traffic on the uplink.

  LTE-U communication is superior to WiFi communication in the following points: LTE communication and radio access network (and core network) can be shared; WiFi communication allows each terminal to communicate freely On the other hand, efficient communication can be performed by exchanging control signals on the LTE communication side; the influence on other WiFi devices is lower than that of the WiFi device itself; On the other hand, WiFi communication has an advantage that the number of base stations (access points, APs) already installed is large.

"Introducing LTE in Unlicensed Spectrum", Qualcomm, Ericsson (downloaded on April 25, 2014 from http://www.3gpp.org/ftp/tsg_ran/TSG_RAN/TSGR_62/Docs/RP-131635.zip) "Extending the benefits of LTE Advanced to unlicensed spectrum", from Qualcomm (http://www.qualcomm.com/media/documents/files/extending-the-benefits-of-lte-advanced-to-unlicensed-spectrum.pdf (Downloaded on April 25, 2014)

  As described above, there are a plurality of types of wireless communication using the unlicensed frequency band. In addition, wireless communication using the unlicensed frequency band includes those performed along with wireless communication using the license frequency band. Therefore, a configuration as shown in FIG. 6 is assumed as an example of a configuration of a radio circuit capable of performing a plurality of types of radio communication in the unlicensed frequency band. However, in the wireless circuit shown in FIG. 6, since the number of antennas and circuit elements increases, it is difficult to realize a small terminal.

  The present invention has been made in view of the above-described problems, and a main object of the present invention is to provide a technique for realizing a wireless circuit capable of a plurality of types of wireless communication using an unlicensed frequency band with a smaller number of components.

  In order to solve the above problems, a wireless circuit according to one embodiment of the present invention includes at least one first high-frequency circuit element connected to at least one antenna and at least one connected to at least one antenna. Two second high-frequency circuit elements, a first high-frequency circuit element, a first modulation / demodulation processing unit connected to the second high-frequency circuit element, and a second modulation / demodulation processing unit connected to the second high-frequency circuit element. The at least one first high-frequency circuit element and the first modulation / demodulation processing unit process a radio signal of a first radio communication system that performs radio communication in a licensed frequency band, and the at least one second high-frequency circuit element and The second modulation / demodulation processing unit processes a radio signal of the second radio communication system that performs radio communication in the unlicensed frequency band independently of the radio communication of the first radio communication system. The at least one second high-frequency circuit element and the first modulation / demodulation processing unit process a radio signal of a third radio communication system that performs radio communication in an unlicensed frequency band along with radio communication of the first radio communication system. It is characterized by that.

  According to one embodiment of the present invention, a wireless circuit capable of a plurality of types of wireless communication using an unlicensed frequency band can be realized with a smaller number of components.

It is a block diagram which shows schematic structure of the radio | wireless circuit which concerns on one Embodiment of this invention. It is a figure which shows an example of a principal part structure of the system by which the radio | wireless circuit which concerns on one Embodiment of this invention is used. It is a flowchart explaining control of the connection destination by the radio | wireless circuit which concerns on one Embodiment of this invention. It is a block diagram which shows schematic structure of the radio | wireless circuit which concerns on other embodiment of this invention. It is a block diagram which shows schematic structure of the radio | wireless circuit which concerns on other embodiment of this invention. It is a block diagram which shows schematic structure of the radio | wireless circuit as a reference.

  The present invention includes at least one first high-frequency circuit element connected to at least one antenna, at least one second high-frequency circuit element connected to at least one antenna, a first high-frequency circuit element, and a second A first modulation / demodulation processing unit connected to the high-frequency circuit element; and a second modulation / demodulation processing unit connected to the second high-frequency circuit element. The at least one first high-frequency circuit element and the first modulation / demodulation unit The processing unit processes a radio signal of a first radio communication system that performs radio communication in a licensed frequency band, and the at least one second high-frequency circuit element and the second modulation / demodulation processing unit perform radio communication using the first radio communication system. A wireless signal of a second wireless communication method for performing wireless communication in an unlicensed frequency band independently of the at least one second high-frequency circuit element and the first Tone processing unit provides a radio circuit for processing radio signals of the third wireless communication method for performing wireless communication by unlicensed frequency band with the radio communication by the first wireless communication scheme.

  According to the above configuration, the first wireless communication method wireless communication and the third wireless communication method wireless communication communicate with each other using different antennas and high-frequency circuit elements. Wireless communication of the third wireless communication system can be performed along with the wireless communication. Accordingly, the wireless communication of the first wireless communication method and the wireless communication of the third wireless communication method can be made to cooperate (for example, carrier aggregation in LTE (Long Term Evolution: Long-Term Evolution) or Supplemental downlink). Further, according to the above configuration, the first wireless communication method and the third wireless communication method share the first modulation / demodulation processing unit, and the second wireless communication method and the third wireless communication method. Thus, the second antenna and the second high-frequency circuit element are shared. Thereby, the number of parts can be reduced. As described above, a wireless circuit capable of a plurality of types of wireless communication using an unlicensed frequency band can be realized with a smaller number of components.

  In the following description, LTE (including LTE-Advanced) using a licensed frequency band assigned to each communication carrier is used as the first wireless communication method, and a license-free frequency band is used as the second wireless communication method. An example using WiFi in the 5 GHz band and using LTE-U in the 5 GHz band, which is an unlicensed frequency band, as a third wireless communication system will be described, but the present invention is not limited to this, and wireless in the licensed frequency band is described. A first wireless communication method for performing communication, and a wireless communication method of a type different from the first wireless communication method, and performing a wireless communication in an unlicensed frequency band independently of the wireless communication by the first wireless communication method And a wireless communication method of the same type as the first wireless communication method, and a frequency band that requires no license accompanying wireless communication by the first wireless communication method. The third wireless communication method for performing wireless communication by can be used as appropriate.

  Moreover, below, the example which mounted the radio | wireless circuit which concerns on this invention in communication terminals, such as a mobile telephone and a smart phone, is demonstrated. However, a device on which the wireless circuit according to the present invention is mounted is not particularly limited, and may be mounted on an electronic device other than a communication terminal, such as a tablet terminal, a wearable information terminal, a notebook computer, or a smart home appliance.

Embodiment 1
Hereinafter, an embodiment (Embodiment 1) of the present invention will be described with reference to FIGS.

(Wireless circuit)
FIG. 1 is a block diagram illustrating a schematic configuration of a wireless circuit 100 according to the first embodiment. The radio circuit 100 includes antennas (first antennas) 11 and 12, a duplexer (first high frequency circuit element) 13, a filter (first high frequency circuit element) 14, an LNA (low noise amplifier) (first high frequency circuit element) 15, and 17, power amplifier (first high frequency circuit element) 16, mixer (first high frequency circuit element) 18 to 20, A / D converter (analog-digital converter) (first high frequency circuit element) 21 and 23, D / A converter ( Digital / analog converter (first high frequency circuit element) 22, antennas (second antenna) 31 and 32, switch (second high frequency circuit element) 33, filters (second high frequency circuit elements) 34 to 36, LNA (second high frequency circuit element) Circuit elements) 37 and 39, power amplifier (second high frequency circuit element) 38, mixer (second high frequency circuit element) 40 42, A / D converters (second high frequency circuit elements) 43 and 45, D / A converter (second high frequency circuit elements) 44, modulation / demodulation processing unit (first modulation / demodulation processing unit) 51, modulation / demodulation processing unit (second modulation / demodulation processing) Part) 61 and the control part 70 are provided.

  Among these, the antennas 11 and 12, the duplexer 13, the filter 14, the LNAs 15 and 17, the power amplifier 16, the mixers 18 to 20, the A / D converters 21 and 23, and the D / A converter 22 are LTE blocks for LTE communication. 10 is configured. Also, the antennas 31 and 32, the switch 33, the filters 34 to 36, the LNAs 37 and 39, the power amplifier 38, the mixers 40 to 42, the A / D converters 43 and 45, and the D / A converter 44 are WiFi communication and LTE-U communication. A WiFi / LTE-U block 30 is configured. Further, the modulation / demodulation processing unit 51 constitutes an LTE / LTE-U block 50 for LTE communication and LTE-U communication. Further, the modulation / demodulation processing unit 61 constitutes a WiFi block 60 for WiFi communication.

  When performing LTE communication, the radio circuit 100 operates as follows. When transmitting a radio signal, the control unit 70 generates a transmission signal, the modulation / demodulation processing unit 51 modulates the transmission signal, the D / A converter 22 converts the transmission signal into analog, the mixer 19 upconverts the transmission signal, The power amplifier 16 amplifies the transmission signal, the duplexer 13 transmits the transmission signal to the antenna 11, and the antenna 11 radiates the transmission signal. When receiving a radio signal, the antennas 11 and 12 receive the received signal, the duplexer 13 and the filter 14 transmit the received signal to the LNAs 15 and 17, the LNAs 15 and 17 amplify the received signal, and the mixers 18 and 20 The received signal is down-converted, the A / D converters 21 and 23 convert the received signal to digital, the modulation / demodulation processing unit 51 demodulates the received signal, and the control unit 70 processes the received signal.

  When performing WiFi communication, the radio circuit 100 operates as follows. When transmitting a radio signal, the control unit 70 generates a transmission signal, the modulation / demodulation processing unit 61 modulates the transmission signal, the D / A converter 44 converts the transmission signal into analog, the mixer 41 upconverts the transmission signal, The power amplifier 38 amplifies the transmission signal, the filter 35 and the switch 33 transmit the transmission signal to the antenna 31, and the antenna 31 radiates the transmission signal. When receiving a radio signal, the antennas 31 and 32 receive the received signal, the switch 33 and the filters 34 and 36 transmit the received signal to the LNAs 37 and 39, the LNAs 37 and 39 amplify the received signal, and the mixer 40 and 42 down-converts the received signal, A / D converters 43 and 45 digitally convert the received signal, modulation / demodulation processing unit 61 demodulates the received signal, and control unit 70 processes the received signal.

  Moreover, when performing LTE-U communication, the radio circuit 100 operates as follows. When transmitting a radio signal, the control unit 70 generates a transmission signal, the modulation / demodulation processing unit 51 modulates the transmission signal, the D / A converter 44 converts the transmission signal into analog, the mixer 41 upconverts the transmission signal, The power amplifier 38 amplifies the transmission signal, the filter 35 and the switch 33 transmit the transmission signal to the antenna 31, and the antenna 31 radiates the transmission signal. When receiving a radio signal, the antennas 31 and 32 receive the received signal, the switch 33 and the filters 34 and 36 transmit the received signal to the LNAs 37 and 39, the LNAs 37 and 39 amplify the received signal, and the mixer 40 and 42 down-converts the received signal, A / D converters 43 and 45 digitally convert the received signal, modulation / demodulation processing unit 51 demodulates the received signal, and control unit 70 processes the received signal.

  As described above, when performing LTE communication, the LTE block 10 and the LTE / LTE-U block 50 operate, and when performing WiFi communication, the WiFi / LTE-U block 30 and the WiFi block 60 are operated. When operating and performing LTE-U communication, the WiFi / LTE-U block 30 and the LTE / LTE-U block 50 operate.

  In this way, in LTE communication and LTE-U communication, communication is performed using different blocks for the block including the antenna and the high-frequency circuit element, so that LTE communication and LTE-U communication can be performed simultaneously. LTE-U communication can be performed along with LTE communication. Thereby, for example, carrier aggregation or supplemental downlink can be realized. In addition, since WiFi communication and LTE-U communication share the block including an antenna and a high frequency circuit element, WiFi communication and LTE-U communication cannot be performed simultaneously.

  Further, LTE / LTE-U block 50 is shared by LTE communication and LTE-U communication, and WiFi / LTE-U block 30 is shared by WiFi communication and LTE-U communication. Thereby, the number of parts can be reduced.

(system)
FIG. 2 is a diagram illustrating an example of a main configuration of the system 1 in which the wireless circuit 100 according to the first embodiment is used. The system 1 includes an LTE base station (eNB) 2, a WiFi base station (access point, AP) 4, an LTE-U base station 6, and a communication terminal 8. The communication terminal 8 includes a wireless circuit 100. FIG. 2 shows an LTE communication area 3 that can be connected to the LTE base station 2, a WiFi communication area 5 that can be connected to the WiFi base station 4, and an LTE-U communication area 7 that can be connected to the LTE-U base station 6. Respectively.

  As illustrated in FIG. 2, the communication terminal 8 may belong to any of the LTE communication area 3, the WiFi communication area 5, and the LTE-U communication area 7.

  In such a case, since the radio circuit 100 of the communication terminal 8 cannot perform WiFi communication and LTE-U communication at the same time, the radio circuit 100 (the control unit 70) is connected to the WiFi base station 4 and the LTE-U base station. 6 is connected as follows.

(Control of connection destination)
FIG. 3 is a flowchart for explaining control of the connection destination by the radio circuit 100. In step S1, the control unit 70 confirms the surrounding radio wave status. Specifically, the above-described LTE-U reception operation and WiFi reception operation are performed, and a reception frequency band is searched for a downlink signal from a neighboring base station. At the same time, the reception power is calculated using the reference signal included in the reception signal and whether the connection to the neighboring base stations is possible. Note that the connection possibility indicates that, for example, it is determined whether or not connection is possible due to a base station of a different network operator or a WiFi base station whose connection is restricted.

  As a result of Step S1, when both the connection destination of LTE-U communication and the connection destination of WiFi communication exist (YES in Step S2), the control unit 70 receives the reception power of LTE-U communication and the reception power of WiFi communication. Are compared (step S3). When the reception power of LTE-U communication is higher than the reception power of WiFi communication by X [dB / MHz] or more (YES in step S3), control unit 70 determines that radio circuit 100 performs LTE-U communication. Then, it connects to the LTE-U base station 6 (step S4). On the other hand, when the received power of LTE-U communication is not higher than the received power of WiFi communication by X [dB / MHz] or more (NO in step S3), the control unit 70 indicates that the radio circuit 100 performs WiFi communication. Determine and connect to the WiFi base station 4 (step S5). [DB / MHz] indicates a power ratio per bandwidth.

  Note that “X” is a value set in advance depending on whether LTE-U communication or WiFi communication is prioritized. For example, by setting a negative value, LTE having advantages over WiFi communication is provided. -U communication can be prioritized.

  As described above, the control unit 70 determines that the reception power of wireless communication by LTE-U (third wireless communication method) is a predetermined value for the reception power of wireless communication by WiFi (second wireless communication method). The wireless circuit performs wireless communication by WiFi (second wireless communication method) when the value is lower than the added value, and performs wireless communication by LTE-U (third wireless communication method) otherwise. By controlling 100, the reception power of wireless communication by LTE-U (third wireless communication system) adds a predetermined value to the reception power of wireless communication by WiFi (second wireless communication system) If the value is greater than or equal to the value, wireless communication is performed by LTE-U (third wireless communication method) that can cooperate with wireless communication by LTE (first wireless communication method), and LTE-U (third wireless communication method). No) When the received power of communication is lower than a value obtained by adding a predetermined value to the received power of wireless communication by WiFi (second wireless communication method), wireless communication by WiFi (second wireless communication method) is performed. By doing so, efficient communication can be performed.

  As a result of step S1, when only one of the connection destination of LTE-U communication and the connection destination of WiFi communication exists (NO in step S2), the connection destination of LTE-U communication exists. In the case (YES in step S6), step S4 is executed, and when the connection destination of the LTE-U communication does not exist (NO in step S6), step S5 may be executed.

(Modification of connection destination control)
Note that the control unit 70 may control the radio circuit 100 so that wireless communication using WiFi (second wireless communication method) and wireless communication using LTE-U (third wireless communication method) are performed in a time-sharing manner. Good. In other words, the control unit 70 may switch between using the WiFi / LTE-U block 30 for WiFi communication or LTE-U communication at predetermined time intervals. As a result, both the WiFi base station 2 and the LTE-U base station 4 are simultaneously connected, and both wireless communication by WiFi (second wireless communication system) and wireless communication by LTE-U (third wireless communication system) are performed. Can be performed in parallel.

[Embodiment 2]
The WiFi / LTE-U block 30 shared between WiFi communication and LTE-U communication includes at least one antenna (second antenna), at least one high-frequency circuit element (second high-frequency circuit element), and As long as it is included. The WiFi communication and the LTE-U communication may each include a unique high-frequency circuit element in addition to the high-frequency circuit element (second high-frequency circuit element). This will be described with an example. For convenience of explanation, members having the same functions as those described in the embodiment are given the same reference numerals, and descriptions thereof are omitted.

  FIG. 4 is a block diagram showing a schematic configuration of a wireless circuit 101 according to another embodiment (Embodiment 2) of the present invention. When compared with the wireless circuit 100, the wireless circuit 101 replaces the A / D converters 43 and 45 and the D / A converter 44 with A / D converters 62, 64, 81 and 83 and D / A converters 63 and 82. I have. The WiFi / LTE-U block 30 includes antennas 31 and 32, a switch 33, filters 34 to 36, LNAs 37 and 39, a power amplifier 38, and mixers 40 to 42. The WiFi block 60 includes a modulation / demodulation processing unit 61, A / D converters 62 and 64, and a D / A converter 63. The A / D converters 81 and 83 and the D / A converter 82 constitute an LTE-U block 80 for LTE-U communication.

  In this way, a part of the high-frequency circuit elements (second high-frequency circuit elements) constituting the WiFi / LTE-U block 30 (A / D converters 43 and 45 and the D / A converter 44) are deleted, and this is supported. The high-frequency circuit element to be configured may be provided in each of the WiFi block 60 and the LTE-U block 80.

[Embodiment 3]
In addition, the LTE block 10 and the WiFi / LTE-U block 30 may share some or all of the antennas. In other words, at least some of the antennas may be shared in LTE communication, WiFi communication, and LTE-U communication. This will be described with an example. For convenience of explanation, members having the same functions as those described in the embodiment are given the same reference numerals, and descriptions thereof are omitted.

  FIG. 5 is a block diagram showing a schematic configuration of a radio circuit 102 according to another embodiment (third embodiment) of the present invention. The radio circuit 102 includes an antenna 91 and a diplexer 92 instead of the antenna 12 and the antenna 32 when compared with the radio circuit 100. The filter 14 of the LTE block 10 and the filter 36 of the WiFi / LTE-U block 30 are both connected to the antenna 12 via the diplexer 92.

  Thus, in this embodiment, the LTE block 10 and the WiFi / LTE-U block 30 share the antenna 91. In other words, in LTE communication, WiFi communication, and LTE-U communication, The antenna 91 is shared. The signal between the filter 14 and the antenna 91 is, for example, a 2 GHz band, and the signal between the filter 36 and the antenna 91 is, for example, a 5 GHz band, so that the signal is successfully distributed by the diplexer 92. ing.

[Summary]
The radio circuit (100) according to the first aspect of the present invention includes at least one first high-frequency circuit element (13 to 23) connected to at least one antenna and at least one antenna connected to at least one antenna. The second high-frequency circuit element (33 to 43), the first high-frequency circuit element and the first modulation / demodulation processing unit (51) connected to the second high-frequency circuit element, and the second high-frequency circuit element connected to the second high-frequency circuit element A modulation / demodulation processing unit (61), wherein the at least one first high-frequency circuit element and the first modulation / demodulation processing unit process a radio signal of a first radio communication system that performs radio communication in a licensed frequency band, The at least one second high-frequency circuit element and the second modulation / demodulation processing unit perform a second wireless communication that performs wireless communication in an unlicensed frequency band independently of wireless communication by the first wireless communication method. A wireless signal of a communication system, and the at least one second high-frequency circuit element and the first modulation / demodulation processing unit perform a wireless communication in an unlicensed frequency band along with the wireless communication in the first wireless communication system. Processes wireless signals for wireless communication.

  According to the above configuration, the first wireless communication method wireless communication and the third wireless communication method wireless communication perform communication using different high-frequency circuit elements. Accordingly, wireless communication of the third wireless communication method can be performed. Thereby, the wireless communication of the first wireless communication method and the wireless communication of the third wireless communication method can be cooperated (for example, carrier aggregation or supplemental downlink in LTE). Further, according to the above configuration, the first wireless communication method and the third wireless communication method share the first modulation / demodulation processing unit, and the second wireless communication method and the third wireless communication method. The second high-frequency circuit element is shared. Thereby, the number of parts can be reduced. As described above, a wireless circuit capable of a plurality of types of wireless communication using an unlicensed frequency band can be realized with a smaller number of components.

  The wireless circuit according to aspect 2 of the present invention is the wireless circuit according to aspect 1, in which the first wireless communication method is LTE, the second wireless communication method is WiFi, and the third wireless communication method is LTE- U may be sufficient.

  According to said structure, the radio | wireless circuit which can perform LTE communication, WiFi communication, and LTE-U communication is realizable with a smaller number of components.

  In the wireless circuit according to aspect 3 of the present invention, in the aspect 1 or 2, the at least one second high-frequency circuit element includes a filter (34 to 36), a switch (33), a power amplifier (38), and an LNA (37 39), an A / D converter (43, 45), a D / A converter (44), and one or more high-frequency circuit elements selected from the mixers (40 to 42).

  According to the above configuration, one or more high-frequency circuit elements selected from a filter, a switch, a power amplifier, an LNA, an A / D converter, a D / A converter, and a mixer are connected to the second wireless communication system and the third wireless communication system. Since it can be shared with the wireless communication system, the wireless circuit can be realized with a smaller number of components.

  In the wireless circuit according to aspect 4 of the present invention, in the above aspects 1 to 3, the reception power of the wireless communication by the third wireless communication system is a value predetermined as the reception power of the wireless communication by the second wireless communication system. If the value is lower than the added value, wireless communication is performed according to the second wireless communication method, and otherwise, the control unit that controls the wireless circuit so as to perform wireless communication according to the third wireless communication method ( 70).

  According to the above configuration, when the reception power of the wireless communication by the third wireless communication method is equal to or more than a value obtained by adding a predetermined value to the reception power of the wireless communication by the second wireless communication method, the first Performs wireless communication by the third wireless communication method that can cooperate with wireless communication by the wireless communication method, and the reception power of the wireless communication by the third wireless communication method is received by the second wireless communication method. When the power is lower than a value obtained by adding a predetermined value to the power, efficient communication can be performed by performing wireless communication by the second wireless communication method.

  A wireless circuit according to aspect 5 of the present invention controls the wireless circuit according to aspects 1 to 3 so that wireless communication using the second wireless communication system and wireless communication using the third wireless communication system are performed in a time-sharing manner. The control part (70) to perform may be provided.

  According to the above configuration, the wireless communication by the second wireless communication method and the wireless communication by the third wireless communication method are performed in a time-sharing manner, so that the wireless communication by the second wireless communication method and the third wireless communication are performed. Both types of wireless communication can be performed.

  An electronic device according to an aspect 6 of the present invention includes the wireless circuit according to any one of the above aspects 1 to 5.

  According to said structure, the said electronic device has an effect similar to the above-mentioned radio | wireless circuit.

  The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments. Is also included in the technical scope of the present invention. Furthermore, a new technical feature can be formed by combining the technical means disclosed in each embodiment.

  The present invention can be used in the field of manufacturing a wireless circuit and an electronic device including the wireless circuit.

  DESCRIPTION OF SYMBOLS 1 System; 2 LTE base station; 3 LTE communication area; 4 WiFi base station; 5 WiFi communication area; 6 LTE-U base station; 7 LTE-U communication area; 8 Communication terminal (electronic device); 11, 12 antenna (first antenna); 13 duplexer (first high frequency circuit element); 14 filter (first high frequency circuit element); 15, 17 LNA (first high frequency circuit element); 16 power amplifier (first high frequency circuit element) 18) to 20 mixer (first high frequency circuit element); 21, 23 A / D converter (first high frequency circuit element); 22 D / A converter (first high frequency circuit element); 30 for WiFi / LTE-U 31; 32 antenna (second antenna); 33 switch (second high frequency circuit element); 34 to 36 filter (second high) 37, 39 LNA (second high frequency circuit element); 38 Power amplifier (second high frequency circuit element); 40-42 Mixer (second high frequency circuit element); 43, 45 A / D converter (second) High-frequency circuit element); 44 D / A converter (second high-frequency circuit element); 50 LTE / LTE-U block; 51 Modulation / demodulation processing unit (first modulation / demodulation processing unit); 60 WiFi block; 61 Modulation / demodulation processing unit (first 62, 64 A / D converter; 63 D / A converter; 70 control unit; 80 LTE-U block; 81, 83 A / D converter; 82 D / A converter; 91 antenna; 92 diplexer ; 100 to 102 radio circuit

Claims (5)

At least one first high-frequency circuit element connected to at least one antenna;
At least one second high-frequency circuit element connected to at least one antenna;
A first modulation / demodulation processing unit connected to the first high-frequency circuit element and the second high-frequency circuit element;
A second modulation / demodulation processing unit connected to the second high-frequency circuit element,
The at least one first high-frequency circuit element and the first modulation / demodulation processing unit process a wireless signal of a first wireless communication system that performs wireless communication using a licensed frequency band,
The at least one second high-frequency circuit element and the second modulation / demodulation processing unit receive a radio signal of a second radio communication system that performs radio communication in an unlicensed frequency band independently of radio communication by the first radio communication system. Process,
The at least one second high-frequency circuit element and the first modulation / demodulation processing unit process a radio signal of a third radio communication system that performs radio communication in an unlicensed frequency band along with radio communication of the first radio communication system. A wireless circuit characterized by the above. The first wireless communication method is LTE,
The second wireless communication method is WiFi,
The radio circuit according to claim 1, wherein the third radio communication system is LTE-U.   The at least one second high-frequency circuit element includes at least one high-frequency circuit element selected from a filter, a switch, a power amplifier, an LNA, an A / D converter, a D / A converter, and a mixer. Item 3. The wireless circuit according to Item 1 or 2.   If the reception power of the wireless communication by the third wireless communication system is lower than the value obtained by adding a predetermined value to the reception power of the wireless communication by the second wireless communication system, the wireless communication by the second wireless communication system 4. A control unit that performs communication, and otherwise controls the wireless circuit so as to perform wireless communication according to a third wireless communication system. A radio circuit according to 1.   The control part which controls the said radio | wireless circuit is provided so that the radio | wireless communication by a 2nd radio | wireless communication system and the radio | wireless communication by a 3rd radio | wireless communication system may be performed by time division. The radio circuit according to any one of the above.

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